Haptic Steering Wheel Interface for Vehicle Collision Warning
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Solution Overview
Problem
Current driver warning systems, such as Lane-Departure Warning and Forward Collision Warning, are ineffective in addressing driver errors during dynamic driving conditions and do not provide timely and transparent advisory information to prevent collisions.
Innovation Solution
A vehicle-based forward sensing system with a haptic driver interface and controller that detects proximity to other vehicles and activates the interface if the distance is below a predefined threshold, providing warnings and enhancing driver awareness through haptic feedback, visual, and auditory cues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional visual or auditory warning systems are used to alert drivers of potential hazards, then driver awareness is improved, but driver response time is insufficient and collision prevention effectiveness deteriorates
Solution Approach 1:
The patent replaces traditional visual and auditory warning systems with a haptic feedback system that uses tactile sensations through the steering wheel. The controller activates haptic actuators to generate vibrational or resistive forces on the steering wheel, providing immediate physical feedback to the driver about potential hazards ahead, thereby reducing response time and improving collision prevention effectiveness
Solution Approach 2:
The steering wheel serves as an intermediary device between the hazard detection system and the driver. Instead of directly presenting visual or auditory warnings that require cognitive processing, the system transmits hazard information through tactile sensations on the steering wheel, creating a more direct and immediate communication channel that enhances driver response
2Loss of time
If haptic feedback systems are added to provide immediate driver warning, then driver response time is improved, but device complexity increases
Solution Approach 1:
The patent integrates haptic feedback functionality into the existing steering wheel structure, allowing the steering wheel to serve multiple purposes: traditional steering control and hazard warning delivery. By incorporating haptic actuators and sensors into the steering wheel assembly, the system achieves multi-functionality without adding separate warning devices, thereby limiting the increase in overall system complexity
Solution Approach 2:
The haptic feedback system is merged with the existing steering wheel and sensor systems. The controller integrates hazard detection data from forward sensors with the haptic actuation system, combining multiple functions (hazard detection, processing, and warning delivery) into a unified system architecture that reduces complexity compared to separate systems
3Reliability
If forward sensing systems continuously monitor distance to other vehicles, then collision warning capability is improved, but energy consumption increases
Solution Approach 1:
The forward sensing system operates periodically rather than continuously, with the controller activating sensors and haptic warnings only when specific conditions are met (e.g., vehicle in gear, throttle released, brake not applied). This periodic operation maintains collision warning capability while significantly reducing energy consumption during normal driving conditions
Solution Approach 2:
The system dynamically adjusts its monitoring and warning activation based on driving conditions. The controller evaluates multiple parameters (gear position, throttle state, brake status) to determine when to activate the sensing and warning systems, creating a dynamic operation mode that optimizes energy consumption while maintaining reliability when needed
4Productivity
If haptic feedback provides immediate tactile warning, then driver response effectiveness is improved, but driver comfort deteriorates due to excessive vibration
Solution Approach 1:
The controller dynamically adjusts haptic feedback parameters including vibration frequency, amplitude, and duration based on the severity and type of hazard detected. By changing these parameters, the system maintains high driver response effectiveness for critical hazards while reducing discomfort for less severe situations, optimizing the balance between warning effectiveness and driver comfort
Data Source
AI summary
A method for advising a driver of a vehicle including a haptic driver interface may include determining a speed of the vehicle, determining a distance between the vehicle and another vehicle, and activating the haptic driver interface based on the speed and distance.